Why a bigger battery barely moves your monthly bill
A battery does not make energy, it moves it. Here is the rands-per-shifted-kWh arithmetic that decides whether a bigger battery can lower your monthly bill.
Roof to Meter
What an Installer Checks Before Accepting Your Roof Pitch
Roof pitch is fixed, so the design has to bend around it. What a reviewer checks in a solar quote when the tilt and row spacing don't match the roof.
The hybrid app figure most owners never think to check
The daily battery discharge total, not the live flow arrow, shows whether a hybrid battery is cycled by design or drained by loads nobody meant to back up.
What solar engineers check in a LiFePO4 home battery
Cell voltage spread, C-rate, depth of discharge, BMS balancing and temperature: what actually decides whether a LiFePO4 home battery in South Africa lasts.
Zero export solar is possible even where the grid says no
Zero export solar is possible where the grid refuses. How control moves to the meter, where surplus power goes, and why a load-drop test matters.
How A Stage 4 Outage Really Tests Your Battery Bank
Stage 4 means about eight outage hours a day in four blocks. Here is how usable battery capacity, not the nameplate figure, decides what stays on.
That 5 kW Inverter Label Won't Start Your Borehole Pump
Inverter size comes from simultaneous load and motor start-up surge, not panel count. Why a bigger machine can still fail, and what oversizing really costs.
Why an off-grid inverter can never pass the NRS test
An off-grid inverter has no grid-tied input port, so NRS 097-2-1 has nothing to test. Here's how to check what a unit can legally do at the meter.
Why your garage may be killing your LiFePO4 battery
South African garages and roof spaces run far hotter and colder than the datasheet's 25°C. Here's what that does to LiFePO4 cells and what to watch.
The Gap Between Grid And Battery That Resets Your Devices
The grid drops, the inverter switches in milliseconds, and some devices sail through while others reboot. Here's what decides which is which.